Ingredients

Ingredient Amount
Custer Feldspar 77.00
Silica 0.10
Whiting 6.20
EPK 4.30
Gerstley Borate 12.40
Add Amount
Red Iron Oxide 7.50

Instructions

This glaze is from the book, "High Fire Glazes" by John Britt.

This is a black/ breaking to brown glaze.
The test tile is B-Mix fired in reduction.